the ATI AP app is based on the Lunatics AP app. SO you'd just be changing names and still be running a similar, if not the same, app. Lunatics installer does all the work. You can even install the MB app for your GPU through the installer. Your GPU should be able to handle it.

for the CPU try the SSE3 app for intel processors. It may run better on the SSSE3 but other will have to fill you in on that. Either way your CPU and GPU are both quite capable of handling the work.

I'd up the GPU fan speed to about 60% to keep the temps down. You may want to bump it up 10% at a time to see when the max benefit with minimum speed is found. Mine is around 65-70%
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In a rich man's house there is no place to spit but his face.
Diogenes Of Sinope